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Extractive agent for depriving sulphide in C9 fuel oil and depriving method
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A fuel oil and extractant technology, applied in the petroleum industry, refined hydrocarbon oil, etc.
Active Publication Date: 2009-02-04
TIANJIN UNIV
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[0007] There is no report on the desulfurization of C9 fuel oil
Method used
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Embodiment 1
[0023] Mix 20g of C9 fuel oil (see Table 1 for composition) and 20g of solvent diethylene glycol in a 250ml Erlenmeyer flask, stir at a constant temperature of 25°C for 30min, then transfer it to a separatory funnel and let it stand for 30min. Clear layers, the upper layer is The oil phase was weighed after washing with water, and the calculated yield was 91.8%. The total sulfur content of the oil phase was analyzed by microcoulomb method, and the sulfur content before desulfurization was 147ppm, and after desulfurization, the sulfur content was 135ppm, and the desulfurization rate was 8.2%.
[0024] Table 1 Composition of C9 fuel oil
[0025] components
Embodiment 2
[0027] 20g carbon nine fuel oil and solvent are mixed in 250ml Erlenmeyer flask, containing water 10wt% in the solvent, all the other are N, N-dimethylformamide, the mass ratio of oil and solvent is respectively 2: 1, 1: 1, 1:2, stirred at 25°C for 30 minutes, then transferred to a separatory funnel and stood still for 30 minutes, clear layers, the upper layer was the oil phase, washed with water, weighed, calculated the yield, and analyzed the total sulfur content of the oil phase by microcoulometry , to calculate the desulfurization rate. The results are listed in Table 2. It can be seen from the table that the desulfurization rate of more than 30% can be achieved with an oil agent mass ratio of 2:1 to 1:2.
[0028] Table 2 Experimental results of extraction and desulfurization of C9 fuel oil with different mass ratios of oil agents
[0031] Mix 20g C9 fuel oil with solvent in a 250ml Erlenmeyer flask, the solvent contains 10wt% water, the rest is N, N-dimethylformamide, the mass ratio of oil to solvent is 1:1, respectively, at 20°C , 30°C, 40°C, 50°C, 60°C, 70°C, stirred at constant temperature for 30min, then transferred to a separatory funnel and stood still for 30min, clear layers, the upper layer was oil phase, weighed after washing with water, calculated yield, micro The coulometric method was used to analyze the total sulfur content of the oil phase and calculate the desulfurization rate. The results are shown in Table 3. It can be seen from the table that when the extraction temperature is 20°C, 30°C, 40°C, 50°C, 60°C, and 70°C, the desulfurization rate and recovery rate are all better.
[0032] Table 3 Experimental results of extraction and desulfurization of C9 fuel oil at different temperatures
[0033] extraction temperature
[0034] 50
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Abstract
The present invention relates to extractant used to remove sulfide in C9 fuel oil and a removing method. The extractant comprises N, N-dimethylformamide, dimethyl sulfoxide, N-methyl pyrrolidine, triethylene glycol, diethylene glycol, acetonitrile, methanol, ethanol or aqueous single-component solvent or double-component mixed solvent or three-component mixed solvent: the mass percentage composition of each component of the extractant is as follows: a first component: 70 percent to 100 percent; a second component: 0 percent to 30 percent; and a third component: 0 percent to 20 percent. According to a mass portion ratio which is 2 : 1 to 1 : 2, the C9 fuel oil and the extractant are blended, the extraction temperature is between 20 DEG C and 70 DEG C, the extraction time lasts 10 minutes to 60 minutes, the constant-temperature quiescence time lasts 20 minutes to 40 minutes, and after extraction, the C9 fuel oil phase is washed by water in order to wash out the solvent, so that desulfurized fuel oil is produced. The used extractant can take account of both the yield and desulfurization rate of the C9 fuel oil, the desulfurization rate can reach 58 percent, and the yield can reduce the pressure of the subsequent recovery of the solvent.
Description
technical field [0001] The invention relates to extraction desulfurization technology, in particular to an extraction agent and a removal method for removing sulfides in C9 fuel oil. Background technique [0002] Styrene, dicyclopentadiene, vinyltoluene, indene and other unsaturated hydrocarbons and alkylbenzenes in the C9 fraction are suitable for the production of aromatic hydrocarbonpetroleum resins, and aromatic hydrocarbon solvent oil is a by-product. Aromatic hydrocarbonpetroleum resins can be widely used in rubber ingredients , sealants, solvent-based adhesives, coatings, paints, printing inks, waterproof products and concrete curing components, etc., have a broad market. At present, most of the by-product cracked heavy aromatics carbon nine distillate in my country's ethyleneplant is used as fuel, and a small amount is used for the production of petroleum resin, so the economic benefit is not high. The main reason is that the sulfur content of C9 fuel oil is too ...
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